Moisture proof package



March 19, 1968 A. KRINGs l 3,373,918

MOISTURE PROOF PACKAGE Filed Aug. 9, 1966 Bv M+@ ATTORNEYS 3,373,918 MOISTURE PROOF PACKAGE Adam Krings, Bonn, Germany, assignor to Dynamit Nobel Aktiengesellschaft, Troisdorf, Germany Filed Aug. 9, 1966, Ser. No. 571,223 Claims priority, applilc)ation (rmany, Sept. 2, 1965,

6 claims. (ci. 229-14) ABSTRACT F THE DISCLOSURE Ammunition having calibres from to 40 millimeters is usually packaged in 100 rounds that are superimposed in Ilayers within a thin-walled sheet zinc container, which is subsequently closed with a lid soldered around its rim; thereafter, it is the usual practice to package this loaded zinc container within a suitable wooden box. This prior art type of packaging satisfactorily protects the ammunition against mechanical stresses during its transport. However, this prior art type of packaging will provide an adequate protection against the action of moisture only if care is taken to hermetically, in a pore-free manner, seal the Zinc container along the entire rim of the soldered lid. It is very diflicult to attain a tight closure of the thin zinc sheets used in the container, because the prior art sealing involves` a considerable amount of precision work, quite apart fromthe relatively large expenses involved. Also, considerable difficulties arise in the above-mentioned packaging operation involving the use of sheet zinc containers as inserts within wooden boxes.

It is an object of the present invention to provide a simple, inexpensive and satisfactory package, particularly a moisture-proof package'used as an insert. Also, it is an object of the present invention to avoid the above mentioned disadvantages and difficulties of the prior art, while producing a satisfactory package for ammunition having calibres from 20 to 40 millimeters, particularly, a package provided as a pouch or bag made by marginal fusion of either one coextensively folded blank or two blanks coextensively placed upon one another, or by fusing the ends of a tubular section formed from calendered plastic or extruded from soft plastic, preferably polyvinyl chloride, having a thickness of 0.5 mm.; also, it is desirable to provide the pouch or bag with an intermediately fused valve element formed from lateral edge fused coextensive blanks or a folded blank, or formed from a thin tube of plastic, and preferably constructed from polyvinyl chloride plastic.

When the package of the present invention is used for packing ammunition into a wooden box, it is preferably constructed to remain open on one side for receiving the ammunition after it has lbeen placed within the wooden box. Thereafter, the open side of the package is closed and sealed so that the air within the interior of the package may be evacuated through the valve, which simultaneously tests the sealing of the package. After evacuation, the valve is closed, for example, lby fusion.

The protective sheet or package lining of the present invention is so proportioned and constructed that it will rest against and conform to all sides of the wooden box after the ammuntion has been inserted within the package; thus, the blanks or tubular sections are cut to the correct United States Patent O Patented Mar. 19, 1968 ICC size in forming the package. The correct size of the package can be obtained by providing sutlicient allowances at the end face side of the blanks and, respectively, t-ubular sections. Also, it is contemplated that the desired Size corresponding to the interior of the wooden box can be obtained by fusing in blanks in addition to the abovementioned construction.

Further objects, features and advantages of the present invention will appear from the yfollowing description of the accompanying drawing in which:

FIGURE 1 illustrates a protective covering, sheet, package, bag, or pouch made from two coextensive thin sheet blanks and having an air exhaust valve element or conduit;

FIGURE 2 shows the protective covering of FIGURE 1, which has been filled and sealed, accommodated within a corresponding wooden tbox (not shown) or the like, according to one example of conforming the package to the interior shape of the wooden box; and

FIGURES 3 and 3a illustrate a modification of the FIGURE 2 embodiment.

In the protective covering or pouch according to FIG- URE 1, two coextensive sheet blanks 1 are sealingly connected, for example, 'by fusion, completely along three edges or sides and at the outer portion of the fourth side or edge; the Ifourth side is left open between the outer portions to form an inlet or ller opening 4. The fusion of the sides can be accomplished by edge welding 3 which is interrupted only within the area of the air exhaust valve element or air exhaust conduit 2. In the embodiment of FIGURE 1, the air exhaust 2 is also constructed from two coextensive sheet blanks connected along opposite lateral edges by fusion, for example. The air exhaust conduit 2 is welded in between the two sheet blanks 1.

Also, it is contemplated that a single co-extensively folded sheetV blank or a tubular section may be used in forming 'the package instead of the above-described two sheet blanks. With this contemplated construction, one or two welded edges of the FIGURE 1 embodiment would be unnecessary. Likewise, the air exhaust conduit 2 could be constructed of a single co-extensively folded sheet blank or tubular section, and it is contemplated that the conduit 2 could be advantageously located in another position, for example, the position shown in dotted line in FIGURE 1. Furthermore, it is contemplated that the sheet blanks 1 and the air exhaust conduit walls could be constructed of an integral piece of sheet material, particularly by providing at a suitable location on the sheet blank or blanks, or tubular section, corresponding aperture portions for the formation of the exhaust conduit. However, such an integral construction of the exhaust conduit would create a considerable waste of material under certain circumstances, therefore, it is preferred to form the exhaust conduit as a separate piece connected to the sheet blanks or tubular section.

In FIGURES 2, 3, and 3a, the package according to FIGURE 1 has 'been folded or otherwise appropriately formed into a substantially box-shape corresponding to the interior shape of the wooden box (not shown) or the like. This formation of the package has resulted in the formation of generally triangular double walled lug or flap portions 5 at the end face sides of the protective cover or package. Each of the flaps 5 is formed from one of the corners of the FIG. 1 pouch so that the two sheets of the double walled triangular shaped flap are integral along the two outside sides of the triangle. The triangular shaped flaps are folded about their third side against a wall of the formed box-shaped package, particularly the end face 7 as indicated by the dotted lines and dotted arrow 6 in FIGURE 2. Also, it is contemplated that the flaps 5 may be inverted by the arrow in FIGURE 3 so that they will lie flat against the inside of one of the walls of the box-shaped package, particularly the inside of the end face 7. It is seen that in either of the embodiment according to FIGURES 2 or 3, the resulting box-shaped protective covering package is completely sealed for accommodation within a wooden box or similar rigid box so that it can be filled with the material to be packed and sealed, preferably by fusion, in an air-tight manner along the filler opening 4. After the filler opening 4 has been sealed in an air-tight manner, the air within the package is evacuated through the air exhaust conduit 2 (not shown in FIGURES 2, 3 and 3a), while .the sealing or tightness of the protective cover is simultaneously checked. Thereafter, the air exhaust conduit is fused or otherwise closed in an air-tight manner and the wooden box (not shown) is finally closed with a lid.

The above embodiments have been shown and described only as examples of the present in-vention; other modifications and embodiments according to the broad aspects of the invention are contemplated within the spirit and scope of the present invention as defined by the following claims.

I claim:

1. A package, comprising: a pouch having a first generally rectangular flexible sheet, a second generally coextensive rectangular flexible sheet, three edges connecting portions sealingly joining said sheets on substantially three edges, the outer portions of the fourth edge of said pouch being sealed to constitute additional edge connecting portions and to leave a narrow filling slot extending for the major portion of said fourth edge therebetween; said pouch being folded into a generally rectangular six sided configuration corresponding to the interior shape of a box into which it is to be placed wit-h said three connecting portions generally bisecting opposite end sides and the bottom side of said six sided conguration, respectively, said six sided configuration forming two generally triangular double sheet layer bottom aps, each of said bottom flaps having one fold edge coextensive with a corresponding edge of said six sided configuration between lthe corresponding one of said end sides and said bottom side, each of said bottom 'flaps having a portion of said connecting portions bisecting each of its layers generally perpendicular to the corresponding one of said fold edges, said six sided configuration forming two additional triangular double sheet layer top aps substantially identical to said bottom aps, each of said additional top flaps having a fold edge coextensive with a corresponding edge of said six sided configuration between said end sides and the top side of said six sided configuration, respectively.

2. The package of claim 1, including a plurality of rounds of relatively large caliber ammunition within said six sided configuration, means sealing said narrow iilling slot, an exhaust conduit means communicating with the interior of said six sided configuration Ifor exhausting gases from the interior of the sealed six sided configuration after said filling slot has been sealed, and means thereafter sealing said exhaust conduit means, all of said flaps lying substantially parallel to and flat against the corresponding ones of said end sides.

3. The package of claim 2, including a rigid outer box having substantially identical dimensions with and receiving therein said six sided configuration.

4. The package of claim 3, wherein each of said flaps is inverted to lie against the inside of its respective one of said end sides.

5. The package of claim 2, wherein each of said flaps in inverted to lie against the inside of its respective one of said end sides.

6. The package of claim 1, including a rigid outer box having substantially identical dimensions with and receiving therein said six sided configuration.

References Cited UNITED STATES PATENTS 2,672,268y 3/1954 Bower. 3,112,047 11/1963 weinreieh et a1. 3,233,815 2/1966 Eggen 229-87 3,242,630 3/1966 Danieizig 229-53 x DAVID M. BOCKENEK, Primary Examiner. 

